cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A242986 a(n) = 6*(n+1)!/((3+floor(n/2))*(floor(n/2)!)^2).

Table of values

n a(n)
0 2
1 4
2 9
3 36
4 36
5 216
6 140
7 1120
8 540
9 5400
10 2079
11 24948
12 8008
13 112112
14 30888
15 494208
16 119340
17 2148120
18 461890
19 9237800
20 1790712
21 39395664
22 6953544
23 166885056
24 27041560
25 703080560
26 105306075
27 2948570100
28 410605200
29 12318156000
30 1602881040
31 51292193280
32 6263890380

List of values

[2, 4, 9, 36, 36, 216, 140, 1120, 540, 5400, 2079, 24948, 8008, 112112, 30888, 494208, 119340, 2148120, 461890, 9237800, 1790712, 39395664, 6953544, 166885056, 27041560, 703080560, 105306075, 2948570100, 410605200, 12318156000, 1602881040, 51292193280, 6263890380]